Abstract: A combined container and child-resistant closure system includes a double-shell cap with a first skirt and a second skirt disposed within the first skirt. A pair of opposing protrusions extend from an interior surface of the first skirt. A pair of opposing finger pads are provided on an exterior surface of the first skirt. An interior surface of the second skirt is threaded. The container includes a threaded neck and a collar at the base of the neck. An outer edge of the collar forms an ellipse with major and minor axes. A pair of opposing notches are provided at apses of the major axis. When the cap is tightened onto the container, the protrusions mate with the notches to prevent removal of the cap unless the finger pads are compressed, deforming the first skirt such that the protrusions are released from the notches.

Abstract: A combined container and child-resistant closure system includes a double-shell cap with a first skirt and a second skirt disposed within the first skirt. A pair of opposing protrusions extend from an interior surface of the first skirt. A pair of opposing finger pads are provided on an exterior surface of the first skirt. An interior surface of the second skirt is threaded. The container includes a threaded neck and a collar at the base of the neck. An outer edge of the collar forms an ellipse with major and minor axes. A pair of opposing notches are provided at apses of the major axis. When the cap is tightened onto the container, the protrusions mate with the notches to prevent removal of the cap unless the finger pads are compressed, deforming the first skirt such that the protrusions are released from the notches.

Abstract: A child resistant cap for a bottle includes a cover portion with a periphery having a wall with an internal surface surrounds the neck when the cap is positioned on the bottle. The bottle includes a neck, an opening and a rib with a gap. A finger and a locking lug extend from the internal surface. The finger has a length less than a length of the gap. The locking lug has a length greater than the length of the gap. The locking lug and the finger engage the rib and permit a rotation between a first position, where the finger and gap are aligned and a series of second positions, where the finger and gap are not aligned. A tab extends from the cover portion for applying a force to the cover when the cap is in the first position to remove the cap from the bottle.